bug#39892: 28.0.50; Crash when running async command

[Ravine Var <ravine.var@gmail.com>]

Emacs crashes when the output of 'gpg -d' is processed
in the '*Async Shell Command*' buffer. This happens when the
"Noto Sans Symbols2" font is used. To reproduce:

* Inside the emacs git tree, do:
   "gzip configure"
   "gpg -c configure.gz"

* Start 'emacs -Q'

* Eval this: (set-fontset-font t 'unicode "Noto Sans Symbols2" nil 'append)

* In dired, run dired-do-async-shell-command (&) on configure.gz.gpg and
  give 'gpg -d'. gpg now sends the decrypted output to stdout.

* At this point emacs crashes.

Backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x00005555559705bf in AREF (array=0x0, idx=1) at lisp.h:1853
1853      return XVECTOR (array)->contents[idx];

(gdb) bt
#0  0x00005555559705bf in AREF (array=0x0, idx=1) at lisp.h:1853
#1  0x00005555559738cf in reorder_font_vector (font_group=0x5555569695e3, font=0x55555619a030) at fontset.c:403
#2  0x0000555555973f98 in fontset_find_font (fontset=0x555556250f25, c=59896, face=0x555556047d10, charset_id=-1, fallback=false) at fontset.c:565
#3  0x00005555559749b7 in fontset_font (fontset=0x55555687b0e5, c=59896, face=0x555556047d10, id=-1) at fontset.c:775
#4  0x00005555559751f2 in face_for_char (f=0x55555612d6e0, face=0x555556047d10, c=59896, pos=2280, object=0x0) at fontset.c:989
#5  0x00005555555bca03 in FACE_FOR_CHAR (f=0x55555612d6e0, face=0x555556047d10, character=59896, pos=2280, object=0x0) at dispextern.h:1891
#6  0x00005555555d523d in get_next_display_element (it=0x7fffffff92d0) at xdisp.c:7566
#7  0x00005555555d8aad in move_it_in_display_line_to (it=0x7fffffff92d0, to_charpos=2572, to_x=-1, op=MOVE_TO_POS) at xdisp.c:9054
#8  0x00005555555dc31a in move_it_to (it=0x7fffffff92d0, to_charpos=2572, to_x=-1, to_y=-1, to_vpos=-1, op=8) at xdisp.c:9804
#9  0x00005555555dcce7 in move_it_vertically_backward (it=0x7fffffffa6d0, dy=935) at xdisp.c:9998
#10 0x000055555564de4c in Frecenter (arg=0xfffffffffffffffe, redisplay=0x0) at window.c:6560
#11 0x000055555586b2ee in funcall_subr (subr=0x555555e719a0 <Srecenter>, numargs=1, args=0x7fffffffbb60) at eval.c:2869
#12 0x000055555586ae83 in Ffuncall (nargs=2, args=0x7fffffffbb58) at eval.c:2794
#13 0x00005555558d90ca in exec_byte_code (bytestr=0x5555560590e4, vector=0x55555673b2d5, maxdepth=0x32, args_template=0x406, nargs=1, args=0x7fffffffc268) at bytecode.c:633
#14 0x000055555586b987 in funcall_lambda (fun=0x55555673b3b5, nargs=1, arg_vector=0x7fffffffc260) at eval.c:2989
#15 0x000055555586aec7 in Ffuncall (nargs=2, args=0x7fffffffc258) at eval.c:2796
#16 0x000055555586a146 in funcall_nil (nargs=2, args=0x7fffffffc258) at eval.c:2435
#17 0x000055555586a575 in run_hook_with_args (nargs=2, args=0x7fffffffc258, funcall=0x55555586a123 <funcall_nil>) at eval.c:2612
#18 0x000055555586a1ce in Frun_hook_with_args (nargs=2, args=0x7fffffffc258) at eval.c:2477
#19 0x000055555586b1ce in funcall_subr (subr=0x555555e7cc60 <Srun_hook_with_args>, numargs=2, args=0x7fffffffc258) at eval.c:2847
#20 0x000055555586ae83 in Ffuncall (nargs=3, args=0x7fffffffc250) at eval.c:2794
#21 0x00005555558d90ca in exec_byte_code (bytestr=0x555556058fe4, vector=0x55555673b005, maxdepth=0x3a, args_template=0x80a, nargs=2, args=0x7fffffffc838) at bytecode.c:633
#22 0x000055555586b987 in funcall_lambda (fun=0x55555673b155, nargs=2, arg_vector=0x7fffffffc828) at eval.c:2989
#23 0x000055555586aec7 in Ffuncall (nargs=3, args=0x7fffffffc820) at eval.c:2796
#24 0x000055555586a0f9 in Fapply (nargs=2, args=0x7fffffffc8d0) at eval.c:2424
#25 0x000055555586a6ac in apply1 (fn=0x2aaa9e4cecf0, arg=0x555556956033) at eval.c:2640
#26 0x00005555558efa68 in read_process_output_call (fun_and_args=0x555556956043) at process.c:5988
#27 0x00005555558675d0 in internal_condition_case_1 (bfun=0x5555558efa3a <read_process_output_call>, arg=0x555556956043, handlers=0x90,
    hfun=0x5555558efa6a <read_process_output_error_handler>) at eval.c:1379
#28 0x00005555558f0353 in read_and_dispose_of_process_output (p=0x555556143950, chars=0x7fffffffc9e0 "\037\213\b\b\246\020_^", nbytes=4095, coding=0x55555674a590)
    at process.c:6209
#29 0x00005555558eff5d in read_process_output (proc=0x555556143955, channel=5) at process.c:6120
#30 0x00005555558ef28c in wait_reading_process_output (time_limit=30, nsecs=0, read_kbd=-1, do_display=true, wait_for_cell=0x0, wait_proc=0x0, just_wait_proc=0)
    at process.c:5807
#31 0x000055555559e9da in sit_for (timeout=0x7a, reading=true, display_option=1) at dispnew.c:6052
#32 0x0000555555748c67 in read_char (commandflag=1, map=0x555556956cd3, prev_event=0x0, used_mouse_menu=0x7fffffffe271, end_time=0x0) at keyboard.c:2738
#33 0x0000555555757aac in read_key_sequence (keybuf=0x7fffffffe4a0, prompt=0x0, dont_downcase_last=false, can_return_switch_frame=true, fix_current_buffer=true,
    prevent_redisplay=false) at keyboard.c:9549
#34 0x00005555557450b1 in command_loop_1 () at keyboard.c:1350
#35 0x0000555555867529 in internal_condition_case (bfun=0x555555744c4d <command_loop_1>, handlers=0x90, hfun=0x5555557443c2 <cmd_error>) at eval.c:1355
#36 0x0000555555744913 in command_loop_2 (ignore=0x0) at keyboard.c:1091
#37 0x0000555555866d9d in internal_catch (tag=0xcc60, func=0x5555557448e6 <command_loop_2>, arg=0x0) at eval.c:1116
#38 0x00005555557448b1 in command_loop () at keyboard.c:1070
--Type <RET> for more, q to quit, c to continue without paging--
#39 0x0000555555743f9a in recursive_edit_1 () at keyboard.c:714
#40 0x000055555574411c in Frecursive_edit () at keyboard.c:786
#41 0x000055555573c694 in main (argc=2, argv=0x7fffffffe928) at emacs.c:2036

In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, cairo version 1.17.3)
 of 2020-03-04 built on comp-lnx
Repository revision: 21ebfa1dd8129420c832031d055c708075aec02c
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12007000
System Description: Arch Linux

Configured using:
 'configure --prefix=/usr/local --without-rsvg --with-x-toolkit=no
 --without-lcms2 --without-libsystemd --without-dbus --without-gsettings
 --without-selinux --with-sound=no --enable-link-time-optimization
 'CFLAGS=-O3 -march=native''

Configured features:
XPM JPEG TIFF GIF PNG CAIRO NOTIFY INOTIFY ACL GNUTLS LIBXML2 FREETYPE
HARFBUZZ ZLIB OLDXMENU X11 XDBE XIM MODULES THREADS PDUMPER GMP

Important settings:
  value of $LANG: en_IN.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Dired by name

Minor modes in effect:
  iswitchb-mode: t
  save-place-mode: t
  savehist-mode: t
  dired-omit-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: 1
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow face-remap mule-util emacsbug cl-extra help-mode dired-aux
edmacro kmacro emms-browser sort emms-playlist-sort emms-last-played
emms-cache emms-info-libtag emms-info later-do emms-player-simple
emms-playlist-mode emms-source-playlist emms-source-file locate emms
emms-compat iswitchb saveplace savehist visual-fill-column mu4e-contrib
eshell esh-cmd esh-ext esh-opt esh-proc esh-io esh-arg esh-module
esh-groups esh-util bookmark pp mu4e desktop frameset mu4e-org org ob
ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-footnote org-src
ob-comint org-pcomplete pcomplete org-list org-faces org-entities
noutline outline easy-mmode org-version ob-emacs-lisp ob-core ob-eval
org-table ol org-keys org-compat advice org-macs org-loaddefs find-func
mu4e-main mu4e-view cal-menu calendar cal-loaddefs browse-url comint
ansi-color mu4e-headers mu4e-compose mu4e-context mu4e-draft
mu4e-actions ido rfc2368 smtpmail auth-source eieio eieio-core cl-macs
eieio-loaddefs json map sendmail mu4e-mark mu4e-message flow-fill
mu4e-proc mu4e-utils doc-view jka-compr image-mode exif mu4e-lists
cl-seq hl-line mu4e-vars message rmc puny format-spec rfc822 mml mml-sec
password-cache epa derived epg epg-config gnus-util rmail rmail-loaddefs
text-property-search time-date subr-x seq byte-opt gv bytecomp
byte-compile cconv mm-decode mm-bodies mm-encode mail-parse rfc2231
rfc2047 rfc2045 mm-util ietf-drums mail-prsvr mailabbrev mail-utils
gmm-utils mailheader cl-loaddefs cl-lib mu4e-meta dictionary link
connection cycbuf dired-x dired dired-loaddefs xcscope ring easymenu
thingatpt tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode elisp-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors frame minibuffer cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote threads inotify
dynamic-setting font-render-setting cairo x multi-tty
make-network-process emacs)

Memory information:
((conses 16 137708 9076)
 (symbols 48 15722 2)
 (strings 32 51174 3076)
 (string-bytes 1 1720398)
 (vectors 16 27082)
 (vector-slots 8 292203 16378)
 (floats 8 137 87)
 (intervals 56 483 4)
 (buffers 1000 12))